Analog Devices / Mbed OS EVAL-AD7606

Example Program for EVAL-AD7606

Dependencies:   platform_drivers

app/ad7606_support.c@1:819ac9aa5667, 2020-10-05 (annotated)

Committer:
mahphalke
Date:
Mon Oct 05 13:45:15 2020 +0530
Revision:
1:819ac9aa5667
AD7606 IIO Application- Initial Revision

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mahphalke 1:819ac9aa5667 1 /*************************************************************************//**
mahphalke 1:819ac9aa5667 2 * @file ad7606_support.c
mahphalke 1:819ac9aa5667 3 * @brief AD7606 device No-OS driver supports
mahphalke 1:819ac9aa5667 4 ******************************************************************************
mahphalke 1:819ac9aa5667 5 * Copyright (c) 2020 Analog Devices, Inc.
mahphalke 1:819ac9aa5667 6 *
mahphalke 1:819ac9aa5667 7 * All rights reserved.
mahphalke 1:819ac9aa5667 8 *
mahphalke 1:819ac9aa5667 9 * This software is proprietary to Analog Devices, Inc. and its licensors.
mahphalke 1:819ac9aa5667 10 * By using this software you agree to the terms of the associated
mahphalke 1:819ac9aa5667 11 * Analog Devices Software License Agreement.
mahphalke 1:819ac9aa5667 12 *****************************************************************************/
mahphalke 1:819ac9aa5667 13
mahphalke 1:819ac9aa5667 14 /******************************************************************************/
mahphalke 1:819ac9aa5667 15 /***************************** Include Files **********************************/
mahphalke 1:819ac9aa5667 16 /******************************************************************************/
mahphalke 1:819ac9aa5667 17
mahphalke 1:819ac9aa5667 18 #include <stdint.h>
mahphalke 1:819ac9aa5667 19
mahphalke 1:819ac9aa5667 20 #include "app_config.h"
mahphalke 1:819ac9aa5667 21 #include "ad7606_support.h"
mahphalke 1:819ac9aa5667 22 #include "ad7606_data_capture.h"
mahphalke 1:819ac9aa5667 23
mahphalke 1:819ac9aa5667 24 /******************************************************************************/
mahphalke 1:819ac9aa5667 25 /********************** Macros and Constants Definition ***********************/
mahphalke 1:819ac9aa5667 26 /******************************************************************************/
mahphalke 1:819ac9aa5667 27
mahphalke 1:819ac9aa5667 28 /******************************************************************************/
mahphalke 1:819ac9aa5667 29 /********************** Variables and User Defined Data Types *****************/
mahphalke 1:819ac9aa5667 30 /******************************************************************************/
mahphalke 1:819ac9aa5667 31
mahphalke 1:819ac9aa5667 32 /******************************************************************************/
mahphalke 1:819ac9aa5667 33 /************************ Functions Definitions *******************************/
mahphalke 1:819ac9aa5667 34 /******************************************************************************/
mahphalke 1:819ac9aa5667 35
mahphalke 1:819ac9aa5667 36 /*!
mahphalke 1:819ac9aa5667 37 * @brief Function to convert adc raw data into equivalent voltage
mahphalke 1:819ac9aa5667 38 * @param adc_raw[in] - ADC raw data
mahphalke 1:819ac9aa5667 39 * @param scale[in] - ADC raw to voltage conversion scale
mahphalke 1:819ac9aa5667 40 * @return equivalent voltage
mahphalke 1:819ac9aa5667 41 */
mahphalke 1:819ac9aa5667 42 float convert_adc_raw_to_voltage(int32_t adc_raw, float scale)
mahphalke 1:819ac9aa5667 43 {
mahphalke 1:819ac9aa5667 44 float voltage;
mahphalke 1:819ac9aa5667 45
mahphalke 1:819ac9aa5667 46 /* Convert adc data into equivalent voltage.
mahphalke 1:819ac9aa5667 47 * scale = (chn_range / MAX_ADC_CNT * 1000) as defined in iio_ad7606.c
mahphalke 1:819ac9aa5667 48 * */
mahphalke 1:819ac9aa5667 49 voltage = (adc_raw * (scale / 1000));
mahphalke 1:819ac9aa5667 50
mahphalke 1:819ac9aa5667 51 return voltage;
mahphalke 1:819ac9aa5667 52 }
mahphalke 1:819ac9aa5667 53
mahphalke 1:819ac9aa5667 54
mahphalke 1:819ac9aa5667 55 /*!
mahphalke 1:819ac9aa5667 56 * @brief Function to get the polarity of analog input
mahphalke 1:819ac9aa5667 57 * @param chn_range_bits[in] - Bits from the channel range register
mahphalke 1:819ac9aa5667 58 * @return UNIPOLAR or BIPOLAR
mahphalke 1:819ac9aa5667 59 */
mahphalke 1:819ac9aa5667 60 polarity_e ad7606_get_input_polarity(uint8_t chn_range_bits)
mahphalke 1:819ac9aa5667 61 {
mahphalke 1:819ac9aa5667 62 polarity_e polarity;
mahphalke 1:819ac9aa5667 63
mahphalke 1:819ac9aa5667 64 if (chn_range_bits >= AD7606C_UNIPOLAR_RANGE_MIN
mahphalke 1:819ac9aa5667 65 && chn_range_bits <= AD7606C_UNIPOLAR_RANGE_MAX) {
mahphalke 1:819ac9aa5667 66 polarity = UNIPOLAR;
mahphalke 1:819ac9aa5667 67 } else {
mahphalke 1:819ac9aa5667 68 polarity = BIPOLAR;
mahphalke 1:819ac9aa5667 69 }
mahphalke 1:819ac9aa5667 70
mahphalke 1:819ac9aa5667 71 return polarity;
mahphalke 1:819ac9aa5667 72 }
mahphalke 1:819ac9aa5667 73
mahphalke 1:819ac9aa5667 74
mahphalke 1:819ac9aa5667 75 /*!
mahphalke 1:819ac9aa5667 76 * @brief Read the num_of_bytes from previous conversion
mahphalke 1:819ac9aa5667 77 * @param dev[in]- Device instance
mahphalke 1:819ac9aa5667 78 * @param num_of_bytes[in] - Number of bytes to read from previous conversion
mahphalke 1:819ac9aa5667 79 * @return SUCCESS in case of success, FAILURE otherwise
mahphalke 1:819ac9aa5667 80 */
mahphalke 1:819ac9aa5667 81 int32_t ad7606_read_conversion_data(struct ad7606_dev *dev,
mahphalke 1:819ac9aa5667 82 uint8_t num_of_bytes)
mahphalke 1:819ac9aa5667 83 {
mahphalke 1:819ac9aa5667 84 memset(dev->data, 0, sizeof(dev->data));
mahphalke 1:819ac9aa5667 85 return spi_write_and_read(dev->spi_desc, dev->data, num_of_bytes);
mahphalke 1:819ac9aa5667 86 }